// 操作共享变量会有问题的售票系统代码
#include <iostream>
#include <mutex>
#include <string>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <pthread.h>
#include "Mutex.hpp"

using namespace MutexModule;

class ThreadData
{
public:
    ThreadData(const std::string &n, Mutex &lock)
        : name(n),
          lockp(&lock)
    {}
    ~ThreadData() {}
    std::string name;
    Mutex *lockp;
};
pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
int ticket = 1000;
// void *route(void *arg)
// {
//     char *id = (char *)arg;
//     while (1)
//     {
//         if (ticket > 0) // 1. 判断
//         {
//            //usleep(1000);                               // 模拟抢票花的时间
//             printf("%s sells ticket:%d\n", id, ticket); // 2. 抢到了票
//             ticket--;                                   // 3. 票数--
//         }
//         else
//         {
//             break;
//         }
//     }
//     return nullptr;
// }

void *route(void *arg)
{
    ThreadData *td = static_cast<ThreadData *>(arg);
    while (1)
    {
        {
            LockGuard guard(*td->lockp); // 加锁完成, RAII风格的互斥锁的实现
            if (ticket > 0)
            {
                usleep(1000);
                printf("%s sells ticket:%d\n", td->name.c_str(), ticket);
                ticket--;
            }
            else
            {
                break;
            }
        }

        usleep(123); //非临界代码！！
    }

    return nullptr;
}

// int main()
// {
//     pthread_t t1, t2, t3, t4;

//     pthread_create(&t1, NULL, route, (void *)"thread 1");
//     pthread_create(&t2, NULL, route, (void *)"thread 2");
//     pthread_create(&t3, NULL, route, (void *)"thread 3");
//     pthread_create(&t4, NULL, route, (void *)"thread 4");

//     pthread_join(t1, NULL);
//     pthread_join(t2, NULL);
//     pthread_join(t3, NULL);
//     pthread_join(t4, NULL);
// }

int main(void)
{

    Mutex lock;
    pthread_t t1, t2, t3, t4;
    ThreadData *td1 = new ThreadData("thread 1", lock);
    pthread_create(&t1, NULL, route, td1);

    ThreadData *td2 = new ThreadData("thread 2", lock);
    pthread_create(&t2, NULL, route, td2);

    ThreadData *td3 = new ThreadData("thread 3", lock);
    pthread_create(&t3, NULL, route, td3);

    ThreadData *td4 = new ThreadData("thread 4", lock);
    pthread_create(&t4, NULL, route, td4);

    pthread_join(t1, NULL);
    pthread_join(t2, NULL);
    pthread_join(t3, NULL);
    pthread_join(t4, NULL);
    return 0;
}